DTC P1902: Malfunction of Engine System
DIAGNOSTIC FUNCTION
When the ECM detects the malfunction of the ETV system, the ECM enters the limp-home control mode (throttle valve angle: approximately 20%).
TCM begins controlling the following items: lockup inhibition, increase of secondary pressure, fixing of pulley ratio line.
JUDGMENT CRITERIA
TCM receives the limp-home signal from ECM via CAN.
PROBABLE CAUSES
Malfunction of the engine system (ETV)
DIAGNOSIS
STEP 1. Check the engine-related diagnostic trouble code.
Is the engine-related diagnostic trouble code set?
Carry out the appropriate troubleshooting.
Go to Step 2
.
STEP 2. Symptom recheck after erasing diagnostic trouble code
Is the check result normal?
Intermittent malfunction
Replace the TCM.
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Carry out the appropriate troubleshooting.
Go to Step 2
.Intermittent malfunctionReplace the TCM.